Hi,
I've started working on cmm-mode, a mode for reading Cmm, GHC's
internal version of C-- and the output of -ddump-simpl.
https://github.com/tibbe/cmm-mode
While reading compiler output is definitely a minority use case,
perhaps it wouldn't hurt to include the mode so we can eventually add
commands that compile .hs files to .cmm files and show the result in a
buffer.
-- Johan